6155425221 has 8 divisors (see below), whose sum is σ = 8953345824. Its totient is φ = 3730560720.

The previous prime is 6155425217. The next prime is 6155425223. The reversal of 6155425221 is 1225245516.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6155425221 - 2² = 6155425217 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33), and also a Moran number because the ratio is a prime number: 186528037 = 6155425221 / (6 + 1 + 5 + 5 + 4 + 2 + 5 + 2 + 2 + 1).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6155425223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 93263986 + ... + 93264051.

It is an arithmetic number, because the mean of its divisors is an integer number (1119168228).

Almost surely, 2^6155425221 is an apocalyptic number.

It is an amenable number.

6155425221 is a deficient number, since it is larger than the sum of its proper divisors (2797920603).

6155425221 is a wasteful number, since it uses less digits than its factorization.

6155425221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186528051.

The product of its digits is 24000, while the sum is 33.

The square root of 6155425221 is about 78456.5180275036. The cubic root of 6155425221 is about 1832.6773813740.

The spelling of 6155425221 in words is "six billion, one hundred fifty-five million, four hundred twenty-five thousand, two hundred twenty-one".